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What is the pH of a 0.1 M hydrochloric acid solution?

Practice Questions

Q1
What is the pH of a 0.1 M hydrochloric acid solution?
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Questions & Step-by-Step Solutions

What is the pH of a 0.1 M hydrochloric acid solution?
  • Step 1: Understand that hydrochloric acid (HCl) is a strong acid.
  • Step 2: Know that strong acids dissociate completely in water, meaning they break apart into ions.
  • Step 3: In a 0.1 M solution of HCl, it will produce 0.1 M of hydrogen ions (H+) because it dissociates completely.
  • Step 4: Use the formula for pH, which is pH = -log[H+].
  • Step 5: Substitute the concentration of hydrogen ions into the formula: pH = -log(0.1).
  • Step 6: Calculate the logarithm: -log(0.1) equals 1.
  • Step 7: Conclude that the pH of a 0.1 M hydrochloric acid solution is 1.
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